1245
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| Millennium |
| 2nd millennium |
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| Decades |
| Years |
| 1245 by topic |
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| Arts, history, and science |
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| Countries |
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| Lists of leaders |
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| Birth and death categories |
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| Establishments and disestablishments categories |
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| Works category |
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| Gregorian calendar | 1245 MCCXLV |
| Ab urbe condita | 1998 |
| Armenian calendar | 694 ԹՎ ՈՂԴ |
| Assyrian calendar | 5995 |
| Balinese saka calendar | 1166–1167 |
| Bengali calendar | 652 |
| Berber calendar | 2195 |
| English Regnal year | 29 Hen. 3 – 30 Hen. 3 |
| Buddhist calendar | 1789 |
| Burmese calendar | 607 |
| Byzantine calendar | 6753–6754 |
| Chinese calendar | 甲辰年 (Wood Dragon) 3941 or 3881 — to — 乙巳年 (Wood Snake) 3942 or 3882 |
| Coptic calendar | 961–962 |
| Discordian calendar | 2411 |
| Ethiopian calendar | 1237–1238 |
| Hebrew calendar | 5005–5006 |
| Hindu calendars | |
| - Vikram Samvat | 1301–1302 |
| - Shaka Samvat | 1166–1167 |
| - Kali Yuga | 4345–4346 |
| Holocene calendar | 11245 |
| Igbo calendar | 245–246 |
| Iranian calendar | 623–624 |
| Islamic calendar | 642–643 |
| Japanese calendar | Kangen 3 (寛元３年) |
| Javanese calendar | 1154–1155 |
| Julian calendar | 1245 MCCXLV |
| Korean calendar | 3578 |
| Minguo calendar | 667 before ROC 民前667年 |
| Nanakshahi calendar | −223 |
| Thai solar calendar | 1787–1788 |
| Tibetan calendar | ཤིང་ཕོ་འབྲུག་ལོ་ (male Wood-Dragon) 1371 or 990 or 218 — to — ཤིང་མོ་སྦྲུལ་ལོ་ (female Wood-Snake) 1372 or 991 or 219 |
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1245 (MCCXLV) was a common year starting on Sunday of the Julian calendar, the 1245th year of the Common Era (CE) and Anno Domini (AD) designations, the 245th year of the 2nd millennium, the 45th year of the 13th century, and the 6th year of the 1240s decade. As of the start of 1245, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.
Events
- Rebellion against king Sancho II of Portugal in favor of his brother Alphonso.
- The rebuilding of Westminster Abbey is started.
- Pope Innocent IV sends two missions to the Mongol Khan, suggesting that the Mongols convert to Christianity.